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Finding the Fourth Proportional to 518,856.60, 777,701.70 and 266,039.40

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Solution

The fourth proportional to 518,856.60, 777,701.70 and 266,039.40 is: 398,760.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,856.60 : 777,701.70 = 266,039.40 : x
  2. Step 2: Convert to fraction form
    518,856.60/777,701.70 = 266,039.40/x
  3. Step 3: Cross multiply
    518,856.60x = 777,701.70 × 266,039.40
  4. Step 4: Simplify right side
    518,856.60x = 206,899,293,646.98
  5. Step 5: Solve for x
    x = 206,899,293,646.98/518,856.60
  6. Step 6: Final answer
    x = 398,760.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.